• Running from the Tax Man: a retrospective look at the making of the story and the science behind it. With actors Louise Jameson and Michael Keating, director Pennant Roberts, writer and historian Dominic Sandbrook and astronomer Marek Kukula.

• Outtakes

• Trailer: the original BBC1 trailer for the story.

• The Doctor’s Composer – Part Two: the concluding part of the series looking at the career of prolific composer Dudley Simpson, covering his work on the show in the seventies.